Mine could not unscrew since it had an outer plastic clip that kept the two ends from unscrewing.
While I had assumed that the problem was caused by the flat rubber o-rings that seal the glass cylinder at each end, I found the real problem last night. The filter was on the bench so I decided to try to see what went wrong. Did an o-ring leak? What happened?
I began to take it apart when it fell to pieces. The filter is held together by what appears to be a hard plastic piece that is threaded at both ends and which screws into the two metal ends. The threads at one end of this plastic connector had simply pulled out of the metal end fitting. No wonder it was spraying gasoline all over, there was nothing holding it together.
Anyone using this type of filter should immediately replace it with another type of filter. It is dangerous and it is only a matter of time before it will leak.
Wayne